Develop Bugs

Unlock FDD LTE Band 3 (1800MHZ) on OnePlus 3 US Variant

Is there any way that I can buy the EU\Asia or Chinese variant of OnePlus 3 in US from OnePlus or flash a custom ROM or kernerl to get LTE Band 3 on the US variant?

OnePlus AMA going on over @ Reddit, there is no 32GB model coming.
https://www.reddit.com/r/Android/comments/4o308u/oneplus_ama_oneplus_3dition/
as all three models are sporting the Snapdragon 820 you will most likely find it is a ROM lock to certain bands and so flashing the EU/Asia ROM will open up Band 3, Otherwise CM13.

i am interested in finding this out also?
thank you

Snicholls said:
OnePlus AMA going on over @ Reddit, there is no 32GB model coming.
https://www.reddit.com/r/Android/comments/4o308u/oneplus_ama_oneplus_3dition/
as all three models are sporting the Snapdragon 820 you will most likely find it is a ROM lock to certain bands and so flashing the EU/Asia ROM will open up Band 3, Otherwise CM13.
Click to expand...
Click to collapse
It actually might be locked on the Modem side.
Since there were tools to unlock the Bands for OP1, there might some tools coming to do the same for OP3.

Did anybody find a modem file to flash? Or a way to do this?

Benrap said:
Did anybody find a modem file to flash? Or a way to do this?
Click to expand...
Click to collapse
why would you bump a 3 month old thread instead of the latest one with research and info about people doing it?

Network problem in France, buying seller english asian phone

Hello everyone, I bought this wonderful phone from an English seller on Ebay. But since the 1st day, I have big network worries I do not capture the same 4g in town. I come to you because I think this must be a software problem, which is not expected for a commercialization in Europe. I tried several manipulations to unlock the bootloader, trying to change rom..rien to do I have this impression of being stuck..Help me please.
Phone info :
Version d'android : 5.1
Version de bande de base : MPSS.BO.2.5.c3-00060-M8992FAAAANAZM-1.18275.1
Version du noyau : 3.10.49
Numéro de build : LMY47D
Version logicielle : V10b-GLOBAL-COM

anis625 said:
Hello everyone, I bought this wonderful phone from an English seller on Ebay. But since the 1st day, I have big network worries I do not capture the same 4g in town. I come to you because I think this must be a software problem, which is not expected for a commercialization in Europe. I tried several manipulations to unlock the bootloader, trying to change rom..rien to do I have this impression of being stuck..Help me please.
Phone info :
Version d'android : 5.1
Version de bande de base : MPSS.BO.2.5.c3-00060-M8992FAAAANAZM-1.18275.1
Version du noyau : 3.10.49
Numéro de build : LMY47D
Version logicielle : V10b-GLOBAL-COM
Click to expand...
Click to collapse
Make sure the devices lte bands match that of your carriers lte bands. Dont look at 2g and 3g bands. Only lte bands. Second id say make sure your apn settings are correct.
And last is make sure in mobile networks you have global or gsm cdma and lte selected
---------- Post added at 11:22 AM ---------- Previous post was at 11:19 AM ----------
A lot of times this could be due to specific hardware not picking up propper lte bands or those bands not being enabled. Which u can google on enabling hidden lte bands. I didnt notice what model u had from the seller. I noticed u said manipulations of unlocking bl so where u sucsessful? Then its a h815 i believe which would be the global model. Which then could be software relTed or a settings issue.

I had not specified that it is a h815 international version but planned for a planned commercialization in Singapore. According to my operator the antenna 4g near my home uses only the band 800 which is normally compatible with ... I also have a lg g4 that works perfectly with my chip. All APN settings are correct .. Is there a way to force to use this tape?
I tried manipulation to unlock the bootloader with the official version of LG but it is an Asian phone .. I thought of a software problem so I tried with lg bridge that does not pick up my phone. Is there any other way?

anis625 said:
I had not specified that it is a h815 international version but planned for a planned commercialization in Singapore. According to my operator the antenna 4g near my home uses only the band 800 which is normally compatible with ... I also have a lg g4 that works perfectly with my chip. All APN settings are correct .. Is there a way to force to use this tape?
I tried manipulation to unlock the bootloader with the official version of LG but it is an Asian phone .. I thought of a software problem so I tried with lg bridge that does not pick up my phone. Is there any other way?
Click to expand...
Click to collapse
Dont know about ure version i still use old lg flashtool from g2 to flash my stock firmwares but i have a sprint varient which i believe is one of the only few use .tots files instead of .kdz file format

What is the method ?

Converting a X727 to a x720, 4G bands supported ?

Hi, I´m from Portugal and my Carrier is MEO. For 4G they support band 20/3/7.
I want to buy LeTV LeEco Le Pro 3 X727 and it says he only supports 4G FDD-LTE: 2/4/5/7/12/17/29/30/38.
LeEco Le Pro 3 X720 support 4G FDD-LTE: B1/2/3/4/5/7/8/20.
IF i install Lineage rom, or another Rom for X720 on x727 model, do he gonna support the same bands as 720? the 2/7/20?
Thx in advance and sorry for my poor English.

Pastilhas said:
Hi, I´m from Portugal and my Carrier is MEO. For 4G they support band 20/3/7.
I want to buy LeTV LeEco Le Pro 3 X727 and it says he only supports 4G FDD-LTE: 2/4/5/7/12/17/29/30/38.
Click to expand...
Click to collapse
This is not right. X727 have band 3 100%...

Yes I confirm it has B3, I checked on the official LeEco website.
Full LTE List : LTE Bands 1/2/3/4/5/7/8/12/17/29/30/38

Also to answer your question, the supported bands are written to the NVRAM of the phone and aren't part of the rom. So no, if you flash a X720 rom on an X727 you won't unlock any addition bands.

mikeysteele said:
Also to answer your question, the supported bands are written to the NVRAM of the phone and aren't part of the rom. So no, if you flash a X720 rom on an X727 you won't unlock any addition bands.
Click to expand...
Click to collapse
So the supported bands are not written in baseband modem that we flash?? Interesting..

Luckzzz said:
So the supported bands are not written in baseband modem that we flash?? Interesting..
Click to expand...
Click to collapse
Yeah, the baseband chip support all bands as it's part of the SoC. The modem driver is kind of generic. It reads a bit of read only storage on the phone called NV_RAM which contains stuff like the bands the phone supports, the IMEI, etc. So it is sometimes possible to unlock additional bands by editing the NV_RAM

mikeysteele said:
Yeah, the baseband chip support all bands as it's part of the SoC. The modem driver is kind of generic. It reads a bit of read only storage on the phone called NV_RAM which contains stuff like the bands the phone supports, the IMEI, etc. So it is sometimes possible to unlock additional bands by editing the NV_RAM
Click to expand...
Click to collapse
So editing this in the Build.prop makes all x720 custom roms compatible with x727 (in theory)
*EDIT - Of-topic: Melbourne look likes the best city ever. Moving as soon as possible

I have the LEX 727 from Amazon but no working bands 2 or 4, any ideas to help me? changing the rom to the chinese version? something in the modem, baseband?

Luckzzz said:
So editing this in the Build.prop makes all x720 custom roms compatible with x727 (in theory)
*EDIT - Of-topic: Melbourne look likes the best city ever. Moving as soon as possible
Click to expand...
Click to collapse
NVRAM isn't in the build prop, its a special bit of persistent memory in the phone. To edit it you need to put the phone into diagnostic mode and use QPST.
And yeah, Melbourne is pretty sweet. I hope to see you here soon!

How to enable carrier aggregation (LTE+) on Redmi note 5?

Hi!
How to enable carrier aggregation (LTE+) on Redmi note 5 Global? Does it work on Linegae OS?
Best!

CA work by default. I got 4G+ (LTE+) all the time on my RN5P Global

@otonieru
How ? Which bands is it agregating ? I have never seen a 4G+ in my WHYRED"s statusbar
Sent from my whyred using XDA Labs

MikiGry said:
@otonieru
How ? Which bands is it agregating ? I have never seen a 4G+ in my WHYRED"s statusbar
Sent from my whyred using XDA Labs
Click to expand...
Click to collapse
Me too ;(
second question:
what other system can I upload on this phone without bootloader unlucked?

I have the same problem. On order phone i have lte+ but on note i have only lte.
Without u Locke bootloader you can only have oficial roms and devs.
Wysłane z mojego Redmi Note 5 przy użyciu Tapatalka

MikiGry said:
@otonieru
How ? Which bands is it agregating ? I have never seen a 4G+ in my WHYRED"s statusbar
Click to expand...
Click to collapse
see my status bar
it's B40+B40 and B5+B40

@otonieru
So it appears that agregation is somehow limited co certiain bands and therefore works in some countries only :/
Here is Poland B1, B3, B4, B20 and B38 are avaliable. And how did You check which bands is Your phone agegating ?
Sent from my flo using XDA Labs

MikiGry said:
@otonieru
So it appears that agregation is somehow limited co certiain bands and therefore works in some countries only :/
Here is Poland B1, B3, B4, B20 and B38 are avaliable. And how did You check which bands is Your phone agegating ?
Click to expand...
Click to collapse
Network Signal Guru App from Play Store,
and i happen to work in carrier company, so i know which band we are using and how we co figured it

@otonieru
That's a great news
LTE+ was available for You all the time or it just appeared after update ?
I'm asking because somebody tried to enable CA on WHYRED and it was partially succesfull (LTE+ was shown, but CA wasn't working). So now (as CA appears to be working) all that needs to be done is to change in Diag mode which band should be used (to enable CA for different frequencies)
https://forum.xda-developers.com/showpost.php?p=74573146&postcount=3
Sent from my whyred using XDA Labs

MikiGry said:
@otonieru
That's a great news
LTE+ was available for You all the time or it just appeared after update ?
I'm asking because somebody tried to enable CA on WHYRED and it was partially succesfull (LTE+ was shown, but CA wasn't working). So now (as CA appears to be working) all that needs to be done is to change in Diag mode which band should be used (to enable CA for different frequencies)
https://forum.xda-developers.com/showpost.php?p=74573146&postcount=3
Click to expand...
Click to collapse
it's been there since MIUI 9 (time when i bought the phone)
btw, the + sign wont appear to begin with if the band is not aggregated. so i think if u managed to see the sign, the CA should be working

@otonieru
I have never seen a 4G+ sign on my WHYRED Global. My guesses are, that CA is working (as it's working for You), but not with the bands that are avaliable in Poland. In about a month I'm gonna go into USB Diag mode and try to enable something more EU compatible (like B3+B7)
Sent from my whyred using XDA Labs

So i have tried to enable it. I managed to install everything, connect my phone .... But whenever i try to edit NVRAM value it giver error - cant read (no such file ...). I kept left cliking on that value, managed to edit it, rebooted my phone (tried to enable LTE CA on band 1 1+20). No 4G+ though and now QPST wont see my phone anymore :/
Why are those NVRAM values unreadable by QXDM professional and why cant QPST detect my phone (it is visible in device manager as a diagnostic device)
It appears, that those LTE CA items aren"t there. Wird. Is there any way to open a .qnc file to compare two different modems ?
@otonieru @fatnemesis

MikiGry said:
So i have tried to enable it. I managed to install everything, connect my phone .... But whenever i try to edit NVRAM value it giver error - cant read (no such file ...). I kept left cliking on that value, managed to edit it, rebooted my phone (tried to enable LTE CA on band 1 1+20). No 4G+ though and now QPST wont see my phone anymore :/
Why are those NVRAM values unreadable by QXDM professional and why cant QPST detect my phone (it is visible in device manager as a diagnostic device)
It appears, that those LTE CA items aren"t there. Wird. Is there any way to open a .qnc file to compare two different modems ?
@[email protected]
Click to expand...
Click to collapse
you need to make a backup in .xqcn format, and compare it in software like Notepad++
also, it will help to have QRCT tools, not just QPST and QXDM
btw, some values belong to newer modems are no longer readable by older QXDM, you need new version.
no cracked one for that though. You either need to know some qualcomm guys, or work in a company that has access to newer software version (QPDT, QXDM, QRCT. I just happen to be quite lucky to be in the second group.

@otonieru
Yeah. Newer QXDM professional is needed as intra band agreagtion files aren"t readable as well :/
I"ve tried to read something from modem file.qxcn but ... most of it is digits and letters (hexadecimal code i guess)
Can You please check if Yours newer version of QXDM can read LTE CA files ? (they are in NV browser under category RF LTE)
Sent from my whyred using XDA Labs

@otonieru
Can You please check if QXDM 4+ (as this appears to be more up to date LTE capable version) can read LTE CA values ? I would love to now whether downloading cracked QXDM 4 from some dodgy sites and risking installing some nasty malware on my PC is even worth it
Sent from my whyred using XDA Labs

@otonieru
can you share your xqcn file ?

CAN ANYONE PLEASE PROVIDE THE 00028874(LTE BC CONFIG FILE) FILE FOR SDM636 DEVICE ? THANKS IN ADVANCE.

xda.ind said:
CAN ANYONE PLEASE PROVIDE THE 00028874(LTE BC CONFIG FILE) FILE FOR SDM636 DEVICE ? THANKS IN ADVANCE.
Click to expand...
Click to collapse
Rename this into exe and you can generate 00028874 file

Unlock BAND 20 LTE

Hello folks, i need your help to unlock the band 20 of redmi K30 5G. Currently i have Chinese rom installed .
Is a way to unlock the band 20 ? I saw new Xiaomi MI 10, if you change the rom will enable the band 20 . ( in that case is a software limitation)
In our case ?
Thank you !

Nobody can help me ?

Have you tried this method from xda /crossdevice-dev/sony/thread-progress-please-leave-im-updating-t2871269

casimir120 said:
Have you tried this method from xda /crossdevice-dev/sony/thread-progress-please-leave-im-updating-t2871269
Click to expand...
Click to collapse
i dident tried . i dont think to work, is an old version of snapdragon

Let us know if you're making progress... Trying the same thing with a K30 pro.

Any update? Id love to own this phone but need band 20 here in switzerland. Its the only one deactivated that i would need

People tried to unlock bands at the poco F1, but, there was no success, And people tried a lot

I found the possible files causing the restrictions on LTE and 5G bands, but I have no idea how to modify them to unlock bands.
In the policyman folder, the files:
- china_msim_restrictions.xml
- disable_nsa_mmwave_bands.xml
- lte_feature_restrictions.xml
regards
Excuse my writing (I am using Google Translate)

Arielp211 said:
I found the possible files causing the restrictions on LTE and 5G bands, but I have no idea how to modify them to unlock bands.
In the policyman folder, the files:
- china_msim_restrictions.xml
- disable_nsa_mmwave_bands.xml
- lte_feature_restrictions.xml
regards
Excuse my writing (I am using Google Translate)
Click to expand...
Click to collapse
These files doesn't unlock B20 - this is hardware limitation. Bands are configured to nvitems but on 5G phones many things changed.
But could you please share to me your modem log file so i can list all hardware supported 4G bands to my cacombos.com website? I have here instruction how to get log file: https://mt-tech.fi/en/how-to-get-4g...phone/#Method_for_Qualcomm_Devices_after_2020 and you can send it to: https://cacombos.com/contribute . This help me understand what bands & combinations this device support.

costi90 said:
Hello folks, i need your help to unlock the band 20 of redmi K30 5G. Currently i have Chinese rom installed .
Is a way to unlock the band 20 ? I saw new Xiaomi MI 10, if you change the rom will enable the band 20 . ( in that case is a software limitation)
In our case ?
Thank you !
Click to expand...
Click to collapse
If you change any ROMs from global to China and vice versa won't unlock the bands. This is locked down with hardware, not software. Older Qualcomm devices could unlock bands with Qualcomm tools/programs. This isn't the case with newer models.